<template>
    <div class="header">
        <!-- 折叠按钮 -->
        <div class="collapse-btn" @click="collapseChage">
            <i class="el-icon-success"></i>
            <i class="el-icon-unfold"></i>
            <span class="logo">河北东方学院后勤收费系统</span>
        </div>
        <div class="header-right">
            <div class="header-user-con">
                <!-- 全屏显示 -->
                <div class="btn-fullscreen" @click="handleFullScreen">
                    <el-tooltip effect="dark" :content="fullscreen?`取消全屏`:`全屏`" placement="bottom">
                        <i class="el-icon-rank"></i>
                    </el-tooltip>
                </div>
                <!-- 用户头像 -->
                <div class="user-avator"><img src="static/img/user.jpeg"></div>
                <!-- 用户名下拉菜单 -->
                <el-dropdown class="user-name" trigger="click" @command="handleCommand">
                    <span class="el-dropdown-link">
                        {{username}} <i class="el-icon-caret-bottom"></i>
                    </span>
                    <el-dropdown-menu slot="dropdown">
                        <a href="https://baidu.com" target="_blank">
                            <el-dropdown-item>关于作者</el-dropdown-item>
                        </a>
                        <el-dropdown-item divided command="loginout">退出登录</el-dropdown-item>
                    </el-dropdown-menu>
                </el-dropdown>
            </div>
        </div>
    </div>
</template>

<script>
    import bus from './bus';
    export default {
        data() {
            return {
                collapse: false,
                fullscreen: false,
                name: '孤舟蓑笠翁',
                lev: '青铜级',
                message: 2
            }
        },
        computed: {
            username() {
                var self = this;
                let username = self.$common.getSessionStorage('username');
                return username ? username : self.name;
            },
            getlev() {
                var self = this;
                let levList = self.$common.getSessionStorage('lev', true);
                let lev = '';
                if(levList) {
                    for(var i = 0; i < levList.length; i++) {
                        lev += levList[i].roleName;
                    }
                }
                return lev ? lev : self.lev;
            }
        },
        methods: {
            // 用户名下拉菜单选择事件
            handleCommand(command) {
              var self = this;
                if(command == 'loginout') {
                    self.$common.removeSessionStorage('token');
                    self.$router.push('/login');
                }
            },
            // 侧边栏折叠
            collapseChage() {
                this.collapse = !this.collapse;
                // bus.$emit('collapse', this.collapse);
            },
            // 全屏事件
            handleFullScreen() {
                let element = document.documentElement;
                if(this.fullscreen) {
                    if(document.exitFullscreen) {
                        document.exitFullscreen();
                    } else if(document.webkitCancelFullScreen) {
                        document.webkitCancelFullScreen();
                    } else if(document.mozCancelFullScreen) {
                        document.mozCancelFullScreen();
                    } else if(document.msExitFullscreen) {
                        document.msExitFullscreen();
                    }
                } else {
                    if(element.requestFullscreen) {
                        element.requestFullscreen();
                    } else if(element.webkitRequestFullScreen) {
                        element.webkitRequestFullScreen();
                    } else if(element.mozRequestFullScreen) {
                        element.mozRequestFullScreen();
                    } else if(element.msRequestFullscreen) {
                        // IE11
                        element.msRequestFullscreen();
                    }
                }
                this.fullscreen = !this.fullscreen;
            }
        },
        mounted() {
            if(document.body.clientWidth < 1366) {
                this.collapseChage();
            }
        }
    }
</script>

<style scoped>
    .header {
        position: relative;
        box-sizing: border-box;
        width: 100%;
        height: 55px;
        font-size: 22px;
        color: #fff;
    }

    .collapse-btn {
        float: left;
        padding: 0 20px;
        width: 210px;
        display: flex;
        cursor: pointer;
        align-items: center;
        justify-content: flex-start;
        background-color: #218cb1;
    }

    .header .logo {
        line-height: 55px;
        font-size: 15px;
            margin-left: 7px;
    }

    .header-right {
        float: right;
        padding-right: 50px;
    }

    .header-user-con {
        display: flex;
        height: 55px;
        align-items: center;
    }

    .header-user-con .nickname {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        min-width: 60px;
        max-width: 110px;
        font-size: 17px;
        padding-bottom: 4px;
    }

    .btn-fullscreen {
        transform: rotate(45deg);
        margin-right: 5px;
        font-size: 24px;
    }

    .btn-bell,
    .btn-fullscreen {
        position: relative;
        width: 30px;
        height: 30px;
        text-align: center;
        border-radius: 15px;
        cursor: pointer;
    }

    .btn-bell-badge {
        position: absolute;
        right: 0;
        top: -2px;
        width: 8px;
        height: 8px;
        border-radius: 4px;
        background: #f56c6c;
        color: #fff;
    }

    .btn-bell .el-icon-bell {
        color: #fff;
    }

    .user-name {
        margin-left: 10px;
    }

    .user-avator {
        margin-left: 20px;
    }

    .user-avator img {
        display: block;
        width: 40px;
        height: 40px;
        border-radius: 50%;
    }

    .el-dropdown-link {
        color: #fff;
        cursor: pointer;
    }

    .el-dropdown-menu__item {
        text-align: center;
    }
</style>
